Yang Jianye, Guo Like, Yong Xue, Zhang Tongjin, Wang Boyang, Song Haoqiang, Zhao Yong Sheng, Hou Hongwei, Yang Bai, Ding Jie, Lu Siyu
Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450000, China.
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Angew Chem Int Ed Engl. 2022 Aug 15;61(33):e202207817. doi: 10.1002/anie.202207817. Epub 2022 Jul 11.
This work reports the successful preparation of a new type of crystalline luminescent organic nanodot (<3.5 nm) by kinetically trapped self-assembly, which is then used as a simplified π-packing model to simulate the structure of CDs. The precise structure and J-aggregation-induced photoluminescence (PL) of the nanodots are revealed by investigating the structural relationship between the nanodots and the corresponding single crystals and their properties. Compared with the single crystals, crystalline organic nanodots show longer PL lifetime, higher PL quantum yield, and narrower PL peak, indicating that they are potential organic quantum nanodots. In addition, the efficient π-stacking environment in the corresponding single crystals can promote π-aggregation-induced PL anisotropy. This work indicates crystalline organic nanodots with precise structures to be potentially useful for understanding the structures of CDs and to be attractive potential luminescent materials.
这项工作报道了通过动力学捕获自组装成功制备出一种新型的晶体发光有机纳米点（<3.5 nm），然后将其用作简化的π堆积模型来模拟碳点的结构。通过研究纳米点与相应单晶之间的结构关系及其性质，揭示了纳米点精确的结构和J-聚集诱导的光致发光（PL）。与单晶相比，晶体有机纳米点表现出更长的PL寿命、更高的PL量子产率和更窄的PL峰，表明它们是潜在的有机量子纳米点。此外，相应单晶中有效的π堆积环境可促进π聚集诱导的PL各向异性。这项工作表明，具有精确结构的晶体有机纳米点对于理解碳点的结构可能是有用的，并且是有吸引力的潜在发光材料。
